FIELD: digital data transmission. SUBSTANCE: sending end has encoding unit, two modulating units, complex signal generator, clock frequency generator, frequency divider, multiplier, bell-shaped pulse shaper, carrier frequency generator, power amplifier. Receiving end has multiplier, band filter, standard signal generator, synchronizing unit, amplitude detector, analog-to-digital converter, storage device, demodulating unit, least-distorted complex signal element selector unit, decoding unit. Least-distorted complex-signal element selector unit has three switches, two storage registers, comparison circuit. EFFECT: improved noise immunity due to self-selection of most distorted complex-signal element in receiver each time complex signal bit arrives. 3 dwg
